{"id":22948,"date":"2026-08-12T22:18:33","date_gmt":"2026-08-12T20:18:33","guid":{"rendered":"https:\/\/albertobellone.it\/?page_id=22948"},"modified":"2026-08-12T22:24:51","modified_gmt":"2026-08-12T20:24:51","slug":"eyemax-calculator","status":"publish","type":"page","link":"https:\/\/albertobellone.it\/en\/eyemax-calculator\/","title":{"rendered":"EyeMax Calculator \u2014 Scotoma Extension in Degrees"},"content":{"rendered":"<div id=\"eyemax-page\">\n<style>#eyemax-page{max-width:1020px;margin:0 auto;font-size:16px;line-height:1.65}#eyemax-page section{margin-bottom:34px}#eyemax-page h2{font-size:1.45rem;margin:0 0 14px}#eyemax-page h3{font-size:1.08rem;margin:22px 0 6px}#eyemax-page p{margin:0 0 14px}#eyemax-page ul,#eyemax-page ol{margin:0 0 14px 22px}#eyemax-page li{margin-bottom:6px}#eyemax-page a{color:#14636b;text-decoration:underline}#eyemax-page .emx-key{background:#eef8f9;border-left:5px solid #1a7f89;border-radius:10px;padding:16px 20px;font-size:1.05rem;margin:18px 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td{border:none!important;padding:0!important;background:transparent!important;vertical-align:top;display:table-cell!important;width:33.33%!important}#eyemax-app .modestbl tr:nth-child(even) td{background:transparent!important}#eyemax-app .modestbl .mode{width:100%!important;height:100%!important;text-align:left;margin:0}#eyemax-app label.field{font-size:.82rem;font-weight:600;color:var(--ink-soft)}#eyemax-app .grid{display:grid!important}@media(max-width:640px){#eyemax-app .modestbl,#eyemax-app .modestbl tbody,#eyemax-app .modestbl tr,#eyemax-app .modestbl td{display:block!important;width:100%!important}#eyemax-app .modestbl{border-spacing:0!important}#eyemax-app .modestbl td{margin-bottom:10px}}#eyemax-app .modestbl td{height:1px}@media(max-width:640px){#eyemax-app .modestbl td{height:auto!important}#eyemax-app .modestbl .mode{height:auto!important}}#referto{display:none}@media print{body.emx-printing>*{display:none!important}body.emx-printing>#referto{display:block!important;background:#fff;color:#000;font-family:Arial,Helvetica,sans-serif;font-size:11.5pt;line-height:1.45;max-width:100%!important;margin:0;padding:0}body.emx-printing>#referto h1{font-size:16pt;margin:0 0 3pt;color:#000}body.emx-printing>#referto .sub{font-size:9.5pt;color:#333;margin:0 0 14pt;padding-bottom:6pt;border-bottom:2pt solid #000}body.emx-printing>#referto table{width:100%;border-collapse:collapse;margin:0 0 12pt;font-size:11pt}body.emx-printing>#referto th{background:#eee!important;color:#000!important;text-align:left;padding:5pt 7pt;border:1pt solid #888;-webkit-print-color-adjust:exact;print-color-adjust:exact}body.emx-printing>#referto td{padding:5pt 7pt;border:1pt solid #888;vertical-align:top}body.emx-printing>#referto p{font-size:8.5pt;color:#333;margin:0}}<\/style>\n<p><!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 BLOCK 1 \u00b7 INTRODUCTION \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 --><\/p>\n<section>\n<h2>EyeMax Calculator \u2014 Scotoma Extension in Degrees<\/h2>\n<p>Dear colleagues, I am making this simple online calculator available to answer the question that most often stalls candidate selection for the <strong>EyeMax Mono IOL<\/strong> (SharpView Ophthalmology): is my patient&#8217;s maculopathy larger or smaller than <strong>10\u00b0<\/strong>?<br \/>\nPlease note: the 10\u00b0 quoted by the manufacturer and in the literature <strong>are not the lesion diameter, but a RADIUS<\/strong> \u2014 the maximum eccentricity from the foveal centre within which the lens&#8217; hyperaspheric optic optimises the image.<\/p>\n<div class=\"emx-key\"><strong>10\u00b0 radius = 3 mm of retina = 2 disc diameters<\/strong><br \/>\n(= 20\u00b0 diameter in the visual field)<br \/>\n<small>SharpView Ophthalmology, &#8220;Patient Selection&#8221;; Badal\u00e0 et al., OPTH 2024; Hengerer et al., BMC Ophthalmol 2025<\/small><\/div>\n<p>The calculator converts the anatomical measurements we already collect in the clinic \u2014 the <strong>lesion diameter on OCT<\/strong>, the <strong>atrophy area on autofluorescence (FAF)<\/strong>, or the <strong>optic disc comparison<\/strong> on a fundus photo \u2014 into <strong>degrees of radius from the foveal centre<\/strong>, applying axial-length correction (Bennett-Littmann). The result is the value to enter into the official <a href=\"https:\/\/emmselect.sharpviewophthalmology.com\/\" target=\"_blank\" rel=\"noopener\">EyeMax Mono Selector Tool<\/a>.<\/p>\n<p><strong><span style=\"color: #003366;\">Privacy: all calculations are performed locally in the browser. No patient data is transmitted, recorded or stored on this website.<\/span><\/strong><\/p>\n<\/section>\n<p><!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 BLOCK 2 \u00b7 HOW TO USE \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 --><\/p>\n<section>\n<h2>How to use the calculator<\/h2>\n<p><strong>What you need:<\/strong> the patient&#8217;s axial length (AL) and ONE measurement of the macular lesion.<\/p>\n<ol class=\"emx-steps\">\n<li><strong>Enter the axial length (AL)<\/strong> measured with IOLMaster or Lenstar.<br \/>\nIf biometry is not available, the calculator uses the Littmann standard (24.46 mm).<\/li>\n<li><strong>Select ONE measurement mode:<\/strong> <em>1 \u00b7 OCT diameter<\/em> (maximum atrophy diameter in mm, caliper on en-face OCT or B-scan), <em>2 \u00b7 FAF area<\/em> (geographic atrophy area in mm\u00b2 from autofluorescence \/ RegionFinder), or <em>3 \u00b7 Optic disc comparison<\/em> (lesion and disc measured on the same fundus\/SLO photo; 1 disc \u2248 1.5 mm \u2248 5\u00b0).<\/li>\n<li><strong>Read the result:<\/strong> the scotoma extension in degrees of RADIUS and the eligibility outcome<br \/>\n<span style=\"color: #15803d; font-weight: bold;\">\u2264 9\u00b0 eligible<\/span>,<br \/>\n<span style=\"color: #b45309; font-weight: bold;\">9\u00b0\u201310\u00b0 borderline<\/span> (confirm with 10-2 VF, MAIA or MP-3),<br \/>\n<span style=\"color: #c2410c; font-weight: bold;\">10\u00b0\u201312\u00b0 borderline \u2014 to be assessed<\/span>,<br \/>\n<span style=\"color: #b91c1c; font-weight: bold;\">&gt; 12\u00b0 not eligible<\/span>.<\/li>\n<li><strong>Print the report<\/strong> with the dedicated button: it generates a document with patient data, calculation and outcome, ready for the clinical record.<\/li>\n<li><strong>Complete the selection<\/strong> on the <a href=\"https:\/\/emmselect.sharpviewophthalmology.com\/\" target=\"_blank\" rel=\"noopener\">official SharpView selector<\/a><br \/>\n(access restricted to registered professionals).<\/li>\n<\/ol>\n<p><strong>Please note \u2014 visual acuity is NOT enough.<\/strong> Visual acuity measures the resolution threshold of the best residual retinal point, not the extent of the damage: there is no validated VA \u2192 scotoma-degrees formula in the literature. Using visual acuity as a surrogate for the 10\u00b0 cut-off is methodologically incorrect.<\/p>\n<\/section>\n<p><!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 CALCULATOR \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 --><\/p>\n<div id=\"eyemax-app\">\n<div class=\"wrap\">\n<div class=\"site-header\">\n<p><span class=\"kicker\">Professional tool \u00b7 Ophthalmology<\/span><\/p>\n<h2 class=\"ttl\">EyeMax Mono IOL \u2014 Scotoma Extension in Degrees<br \/>\n<small>Estimate of the scotoma RADIUS from the foveal centre (mm \u2192 degrees) for candidate selection<\/small><\/h2>\n<div class=\"warn-strip\">\u26a0 <strong>The 10\u00b0 of the EyeMax Mono selector are a RADIUS<\/strong> (eccentricity from the foveal centre), NOT a diameter. Equivalence: <strong>10\u00b0 = 3 mm of retina = 2 disc diameters<\/strong> (SharpView Ophthalmology, <em>Patient Selection<\/em>; Badal\u00e0 2024; Hengerer 2025).<\/div>\n<\/div>\n<details id=\"patientCard\" class=\"card patient-card\">\n<summary><span class=\"chev\">\u25b6<\/span> 0. Patient data <span style=\"font-weight: 400; font-size: .8rem; color: var(--ink-soft);\">(optional \u2014 only for the printed report, no data is sent online)<\/span><\/summary>\n<div class=\"inner\">\n<div class=\"two-col\"><label class=\"field\">Surname and first name<br \/>\n<input id=\"pNome\" autocomplete=\"off\" type=\"text\" \/><\/label><br \/>\n<label class=\"field\">Examination date<br \/>\n<input id=\"pData\" type=\"date\" \/><\/label><\/div>\n<div class=\"two-col\"><label class=\"field\">Eye<br \/>\n<select id=\"pOcchio\"><option value=\"OD\">OD (right)<\/option><option value=\"OS\">OS (left)<\/option><\/select><\/label><br \/>\n<label class=\"field\">Visual acuity (decimal BCVA)<br \/>\n<input id=\"pVisus\" type=\"text\" placeholder=\"e.g. 0.5\" \/><\/label><\/div>\n<p><label class=\"field\">Diagnosis \/ clinical notes<br \/>\n<textarea id=\"pNote\" rows=\"2\" placeholder=\"e.g. dry AMD with geographic atrophy\u2026\"><\/textarea><\/label><\/p>\n<\/div>\n<\/details>\n<div class=\"grid\">\n<div>\n<section class=\"card\">\n<h3 class=\"ct\"><span class=\"num\">1<\/span> Eye data<\/h3>\n<p class=\"hint\">The mm\u2192degree conversion depends on axial length (Bennett-Littmann correction).<\/p>\n<p><label class=\"field\">Axial length \u2014 AL (IOLMaster \/ Lenstar)<\/label><\/p>\n<div class=\"unit-row\"><input id=\"inAL\" type=\"text\" value=\"24.46\" \/><br \/>\n<span class=\"unit\">mm<\/span><\/div>\n<div id=\"alNote\" class=\"note\">Littmann standard: 24.46 mm. If biometry is not available, use the standard value.<\/div>\n<p><label class=\"field\">Conversion constant at the foveal centre (fixed)<\/label><\/p>\n<div class=\"unit-row\"><input tabindex=\"-1\" readonly=\"readonly\" type=\"text\" value=\"0.300\" \/><br \/>\n<span class=\"unit\">mm\/\u00b0<\/span><\/div>\n<div class=\"note\">273 \u00b5m\/\u00b0 per Drasdo &amp; Fowler 2007 (<em>Vision Research<\/em>). Not editable.<\/div>\n<p><label class=\"field\">\u25b6 mm per degree corrected for AL<\/label><\/p>\n<div class=\"unit-row\"><input id=\"outMmDeg\" tabindex=\"-1\" readonly=\"readonly\" type=\"text\" \/><br \/>\n<span class=\"unit\">mm\/\u00b0<\/span><\/div>\n<div class=\"note\">mm\/\u00b0 = 0.300 \u00d7 (AL \/ 24.46)<\/div>\n<p>&nbsp;<\/p>\n<\/section>\n<section class=\"card\">\n<h3 class=\"ct\"><span class=\"num\">2<\/span> Macular lesion measurement<\/h3>\n<p class=\"hint\">Select ONE mode. In modes 1 and 3 you enter the lesion DIAMETER; the calculation uses the radius (\u00f72). Mode 2 uses the area (mm\u00b2).<\/p>\n<table class=\"modestbl\" role=\"tablist\" style=\"width:100%;table-layout:fixed;border-collapse:separate;border-spacing:8px 4px;margin:0 0 12px\">\n<tbody>\n<tr>\n<td style=\"width:33.33%;padding:0;border:none;background:none;vertical-align:top\"><button type=\"button\" class=\"mode active\" data-mode=\"1\" role=\"tab\" style=\"width:100%;height:100%\"><span class=\"t\">1 \u00b7 OCT diameter<\/span><span class=\"d\">Caliper on en-face OCT or B-scan (mm)<\/span><\/button><\/td>\n<td style=\"width:33.33%;padding:0;border:none;background:none;vertical-align:top\"><button type=\"button\" class=\"mode\" data-mode=\"2\" role=\"tab\" style=\"width:100%;height:100%\"><span class=\"t\">2 \u00b7 FAF area<\/span><span class=\"d\">Autofluorescence, RegionFinder (mm\u00b2)<\/span><\/button><\/td>\n<td style=\"width:33.33%;padding:0;border:none;background:none;vertical-align:top\"><button type=\"button\" class=\"mode\" data-mode=\"3\" role=\"tab\" style=\"width:100%;height:100%\"><span class=\"t\">3 \u00b7 Optic disc comparison<\/span><span class=\"d\">Colour fundus \/ SLO photo (mm)<\/span><\/button><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div id=\"panel1\" class=\"mode-panel active\">\n<p><label class=\"field\"><label class=\"field\">Maximum lesion diameter \u2014 DL<\/label><\/label><\/p>\n<div class=\"unit-row\"><input id=\"inDL\" type=\"text\" placeholder=\"e.g. 6.0\" \/><br \/>\n<span class=\"unit\">mm<\/span><\/div>\n<div class=\"note\">Maximum atrophy\/lesion diameter, measured with a caliper on en-face OCT or B-scan (e.g. Nidek Mirante wide-area 12\u00d79 mm).<\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<div id=\"panel2\" class=\"mode-panel\">\n<p><label class=\"field\"><label class=\"field\">Lesion area (GA)<\/label><\/label><\/p>\n<div class=\"unit-row\"><input id=\"inArea\" type=\"text\" placeholder=\"e.g. 4.0\" \/><br \/>\n<span class=\"unit\">mm\u00b2<\/span><\/div>\n<div class=\"note\">Geographic atrophy measured on autofluorescence with RegionFinder (Spectralis) or equivalent. Equivalent radius = \u221a(Area\/\u03c0).<\/div>\n<p>&nbsp;<\/p>\n<\/div>\n<div id=\"panel3\" class=\"mode-panel\">\n<div class=\"two-col\">\n<div>\n<label class=\"field\"><label class=\"field\">Lesion diameter on photo \u2014 LL<\/label><\/label><\/p>\n<div class=\"unit-row\"><input id=\"inLL\" type=\"text\" placeholder=\"e.g. 3.0\" \/><br \/>\n<span class=\"unit\">mm<\/span><\/div>\n<\/div>\n<div>\n<label class=\"field\"><label class=\"field\">Optic disc diameter \u2014 DP<\/label><\/label><\/p>\n<div class=\"unit-row\"><input id=\"inDP\" type=\"text\" value=\"1.50\" \/><br \/>\n<span class=\"unit\">mm<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"note\">Measure lesion and disc on the SAME image. Default DP 1.50 mm (range 1.3\u20131.8 mm) = 5\u00b0 diameter. The calculation uses the proportion: (LL\/DP) \u00d7 2.5\u00b0 \u00d7 (24.46\/AL).<\/div>\n<\/div>\n<\/section>\n<\/div>\n<div class=\"result-col\">\n<section class=\"card result-card\">\n<h3 class=\"ct\"><span class=\"num\">3<\/span> Result<\/h3>\n<p class=\"hint\">Live formulas, identical to the practice&#8217;s Excel worksheet.<\/p>\n<div class=\"result-row\"><span class=\"k\">Lesion radius<\/span><br \/>\n<span id=\"outRaggioMM\" class=\"v\">\u2014<\/span><\/div>\n<div class=\"hero-result\">\n<div class=\"lbl\">\u2605 Scotoma extension \u2014 degrees of RADIUS<\/div>\n<div class=\"big\"><span id=\"outGradiNum\">\u2014<\/span><small> \u00b0<\/small><\/div>\n<\/div>\n<div class=\"gauge\" aria-hidden=\"true\">\n<div class=\"track\">\n<div class=\"cut\" style=\"left: 66.67%;\"><\/div>\n<div class=\"cut-lbl\" style=\"left: 66.67%;\">cut-off 10\u00b0<\/div>\n<div id=\"gaugeMarker\" class=\"marker\" style=\"left: 0%; visibility: hidden;\"><\/div>\n<\/div>\n<div class=\"scale\">0\u00b05\u00b010\u00b015\u00b0<\/div>\n<\/div>\n<div class=\"result-row\"><span class=\"k\">Equivalent diameter in the visual field<\/span><br \/>\n<span id=\"outDiamDeg\" class=\"v\">\u2014<\/span><\/div>\n<div class=\"result-row\"><span class=\"k\">mm\/\u00b0 corrected for AL<\/span><br \/>\n<span id=\"outMmDeg2\" class=\"v\">\u2014<\/span><\/div>\n<div id=\"verdict\" class=\"verdict idle\">\n<p><span class=\"ico\">\u25d4<\/span><\/p>\n<div>Waiting for data<small>Enter the lesion measurement to obtain the estimate.<\/small><\/div>\n<\/div>\n<div class=\"btn-row\"><button id=\"btnPrint\" class=\"btn\">\ud83d\udda8 Print report<\/button><br \/>\n<button id=\"btnReset\" class=\"btn ghost\">\u21ba Reset<\/button><\/div>\n<\/section>\n<section class=\"card\">\n<h3 class=\"ct\">Eligibility thresholds<\/h3>\n<table>\n<tbody>\n<tr>\n<th>Scotoma radius<\/th>\n<th>Outcome<\/th>\n<\/tr>\n<tr>\n<td>\u2264 9\u00b0<\/td>\n<td style=\"color: var(--green); font-weight: bold;\">ELIGIBLE \u2014 wide margin<\/td>\n<\/tr>\n<tr>\n<td>9\u00b0 \u2013 10\u00b0<\/td>\n<td style=\"color: var(--amber); font-weight: bold;\">BORDERLINE \u2014 confirm with 10-2 VF \/ MAIA \/ MP-3<\/td>\n<\/tr>\n<tr>\n<td>10\u00b0 \u2013 12\u00b0<\/td>\n<td style=\"color: var(--orange); font-weight: bold;\">BORDERLINE \u2014 assess case by case<\/td>\n<\/tr>\n<tr>\n<td>&gt; 12\u00b0<\/td>\n<td style=\"color: var(--red); font-weight: bold;\">NOT eligible<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<\/div>\n<\/div>\n<section class=\"card\">\n<h3 class=\"ct\">Quick equivalence table <span style=\"font-weight: 400; font-size: .78rem; color: var(--ink-soft);\">(standard eye, AL 24.46 mm)<\/span><\/h3>\n<div class=\"table-scroll\">\n<table>\n<tbody>\n<tr>\n<th>Lesion diameter<\/th>\n<th>Lesion radius<\/th>\n<th>RADIUS in degrees<\/th>\n<th>Diameter in degrees<\/th>\n<\/tr>\n<tr>\n<td>1.5 mm<\/td>\n<td>0.75 mm<\/td>\n<td>2.5\u00b0<\/td>\n<td>5.0\u00b0<\/td>\n<\/tr>\n<tr>\n<td>3.0 mm<\/td>\n<td>1.50 mm<\/td>\n<td>5.0\u00b0<\/td>\n<td>10.0\u00b0<\/td>\n<\/tr>\n<tr>\n<td>4.5 mm<\/td>\n<td>2.25 mm<\/td>\n<td>7.5\u00b0<\/td>\n<td>15.0\u00b0<\/td>\n<\/tr>\n<tr class=\"cutoff\">\n<td>6.0 mm<\/td>\n<td>3.00 mm<\/td>\n<td>10.0\u00b0<\/td>\n<td>20.0\u00b0 \u2190 CUT-OFF EyeMax<\/td>\n<\/tr>\n<tr>\n<td>9.0 mm<\/td>\n<td>4.50 mm<\/td>\n<td>15.0\u00b0<\/td>\n<td>30.0\u00b0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<details class=\"ref\">\n<summary><span class=\"chev\">\u25b6<\/span> Formulas used<\/summary>\n<div class=\"body\">\n<div class=\"formula\">corrected mm\/\u00b0 = 0.300 \u00d7 (AL \/ 24.46)   (Bennett-Littmann)<\/div>\n<div class=\"formula\">Mode 1 (OCT diameter):  scotoma RADIUS \u00b0 = (DL \/ 2) \/ corrected mm\/\u00b0<\/div>\n<div class=\"formula\">Mode 2 (FAF area):      scotoma RADIUS \u00b0 = \u221a(Area \/ \u03c0) \/ corrected mm\/\u00b0<\/div>\n<div class=\"formula\">Mode 3 (optic disc comparison): scotoma RADIUS \u00b0 = (LL \/ DP) \u00d7 2.5\u00b0 \u00d7 (24.46 \/ AL)<\/div>\n<p>Formal pure Bennett equivalent: q = 0.01306 \u00d7 (AL \u2212 1.82). With DP = 1.50 mm the mode 3<br \/>\nformula matches (LL\/2)\/corrected mm\/\u00b0 of the Excel worksheet. <strong>Beware the Humphrey<br \/>\n&#8220;10-2&#8221;:<\/strong> the 10-2 grid tests a square area of 10\u00b0\u00d710\u00b0 (5\u00b0 radius per axis):<br \/>\nthe EyeMax calculation needs the MAXIMUM scotoma extension from the grid centre.<\/p>\n<\/div>\n<\/details>\n<details class=\"ref\">\n<summary><span class=\"chev\">\u25b6<\/span> Pre-calculated examples (verified)<\/summary>\n<div class=\"body table-scroll\">\n<table>\n<tbody>\n<tr>\n<th>#<\/th>\n<th>Case<\/th>\n<th>Setup (AL \/ measurement \/ mode)<\/th>\n<th>Scotoma (radius \u00b0)<\/th>\n<th>Outcome<\/th>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>Full GA, emmetrope<\/td>\n<td>AL 24.46 \/ DL 6.0 mm \/ Mode 1<\/td>\n<td>10.00<\/td>\n<td>BORDERLINE<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Small atrophy, emmetrope<\/td>\n<td>AL 24.46 \/ DL 3.0 mm \/ Mode 1<\/td>\n<td>5.00<\/td>\n<td>CANDIDATO ampi margini<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>5 mm atrophy, emmetrope<\/td>\n<td>AL 24.46 \/ DL 5.0 mm \/ Mode 1<\/td>\n<td>8.33<\/td>\n<td>CANDIDATO ampi margini<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>Myope with GA<\/td>\n<td>AL 26.00 \/ DL 5.5 mm \/ Mode 1<\/td>\n<td>8.62<\/td>\n<td>CANDIDATO ampi margini<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>Disc comparison (2 DD)<\/td>\n<td>AL 24.00 \/ LL 3.0 mm \/ DP 1.5 mm \/ Mode 3<\/td>\n<td>5.10<\/td>\n<td>CANDIDATO ampi margini<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>Disc comparison (3 DD)<\/td>\n<td>AL 24.00 \/ LL 4.5 mm \/ DP 1.5 mm \/ Mode 3<\/td>\n<td>7.64<\/td>\n<td>CANDIDATO ampi margini<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>GA by area (AF) \u2014 small<\/td>\n<td>AL 24.46 \/ Area 4 mm\u00b2 \/ Mode 2<\/td>\n<td>3.76<\/td>\n<td>CANDIDATO ampi margini<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>GA large area<\/td>\n<td>AL 24.46 \/ Area 28 mm\u00b2 \/ Mode 2<\/td>\n<td>9.95<\/td>\n<td>BORDERLINE<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/details>\n<details class=\"ref\">\n<summary><span class=\"chev\">\u25b6<\/span> Primary bibliographic sources<\/summary>\n<div class=\"body\">\n<ul>\n<li>SharpView Ophthalmology \u2014 <em>Patient Selection<\/em>: &#8220;\u2026healthy parts of the macula within 10\u00b0 (2-disc diameters or 3 millimetres)&#8221;. <a href=\"https:\/\/www.sharpviewophthalmology.com\/\" target=\"_blank\" rel=\"noopener\">sharpviewophthalmology.com<\/a><\/li>\n<li>Robbie SJ, Tabernero J, Artal P, Qureshi MA. <em>J Refract Surg<\/em> 2018;34:718\u2013725 (EyeMax Mono pilot study).<\/li>\n<li>Badal\u00e0 F, et al. <em>OPTH<\/em> 2024 (PMC11461591) \u2014 criterio di esclusione &#8220;10\u00b0 from foveal centre \/ 2-disc diameters&#8221;.<\/li>\n<li>Hengerer FH, et al. <em>BMC Ophthalmol<\/em> 2025 \u2014 European multicentre study, 196 eyes.<\/li>\n<li>Drasdo N, Fowler CW. <em>Vision Research<\/em> 2007 \u2014 273 \u00b5m\/\u00b0 at the foveal centre.<\/li>\n<li>Bennett-Littmann formula (q = 0.01306 \u00d7 (AL \u2212 1.82)). PMC9341098.<\/li>\n<li>Barteselli G, et al. <em>PLoS ONE<\/em> 2013 (PMC3748183) \u2014 Spectralis caliper, mean error 15.35 \u00b1 6.29 \u00b5m.<\/li>\n<li>Corradetti G, et al. 2021 (PMC9307798) \u2014 GA area (mm\u00b2) on Nidek Mirante.<\/li>\n<li>Nidek Mirante \/ MP-3 \u2014 eye-tracked microperimetry with direct output in degrees (functional gold standard).<\/li>\n<\/ul>\n<\/div>\n<\/details>\n<footer>\n<div class=\"disc\"><strong>Disclaimer.<\/strong> Clinical-educational tool intended for healthcare<br \/>\nprofessionals: it supports data preparation for the EyeMax Mono Selector Tool (SharpView<br \/>\nOphthalmology) and <strong>does not replace the clinical judgement<\/strong> of the surgeon<br \/>\nfor the individual case, nor the official selector. All calculations are performed locally<br \/>\nin the browser: no patient data is transmitted or stored online.<\/div>\n<\/footer>\n<p><!-- Print report: visible only when printing --><\/p>\n<div id=\"referto\">\n<h1>EyeMax Mono IOL \u2014 Scotoma Extension Estimate in Degrees of Radius<\/h1>\n<p class=\"sub\">Report generated by the online calculator \u2014 Dr. Alberto Bellone, Ophthalmologist and Eye Surgeon<\/p>\n<table>\n<tbody>\n<tr>\n<th colspan=\"2\">Patient data<\/th>\n<\/tr>\n<tr>\n<td>Surname and first name<\/td>\n<td id=\"rNome\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>Examination date<\/td>\n<td id=\"rData\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>Eye<\/td>\n<td id=\"rOcchio\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>Visual acuity (BCVA)<\/td>\n<td id=\"rVisus\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>Diagnosis \/ notes<\/td>\n<td id=\"rNote\">\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<table>\n<tbody>\n<tr>\n<th colspan=\"2\">Calculation<\/th>\n<\/tr>\n<tr>\n<td>Axial length (AL)<\/td>\n<td id=\"rAL\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>mm\/\u00b0 corrected<\/td>\n<td id=\"rMmDeg\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>Measurement mode<\/td>\n<td id=\"rMod\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>Entered measurement<\/td>\n<td id=\"rMisura\">\u2014<\/td>\n<\/tr>\n<tr>\n<td>Lesion radius<\/td>\n<td id=\"rRaggioMM\">\u2014<\/td>\n<\/tr>\n<tr>\n<td><strong>Scotoma extension (RADIUS)<\/strong><\/td>\n<td id=\"rGradi\"><strong>\u2014<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Equivalent diameter in the visual field<\/td>\n<td id=\"rDiam\">\u2014<\/td>\n<\/tr>\n<tr>\n<td><strong>EyeMax Mono eligibility outcome<\/strong><\/td>\n<td id=\"rEsito\"><strong>\u2014<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"font-size: .8rem; color: #555;\">Cut-off: scotoma RADIUS \u2264 10\u00b0 = 3 mm = 2 DD (SharpView,<br \/>\nBadal\u00e0 2024, Hengerer 2025). Conversion: 1\u00b0 \u2194 0.300 mm (Drasdo-Fowler 2007) with Bennett-Littmann<br \/>\ncorrection for AL. Clinical-educational tool: it does not replace the surgeon&#8217;s judgement<br \/>\nnor the official SharpView selector.<\/p>\n<\/div>\n<\/div>\n<p><!-- \/wrap --><\/p>\n<\/div>\n<p><!-- \/eyemax-app --><\/p>\n<p><!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 BLOCCO 3 \u00b7 FAQ \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 --><\/p>\n<section>\n<h2>Frequently asked questions<\/h2>\n<details class=\"emx-faq\">\n<summary>Are the EyeMax Mono 10\u00b0 a radius or a diameter?<\/summary>\n<div class=\"a\">\n<p>A <strong>radius<\/strong>. All primary sources agree: 10\u00b0 = eccentricity from the foveal centre = 3 mm of retina = 2 disc diameters. The anatomical check is immediate: the macula measures about 5.5\u20136 mm in diameter, so a 10\u00b0 radius (3 mm) matches the radius of the useful macular area. If the 10\u00b0 were a diameter, the optic would cover only 1.5 mm of radius \u2014 essentially the fovea alone \u2014 incompatible with the lens&#8217; goal of optimising extrafoveal PRLs.<\/p>\n<\/div>\n<\/details>\n<details class=\"emx-faq\">\n<summary>Does the Humphrey 10-2 visual field measure the same thing?<\/summary>\n<div class=\"a\">\n<p>No \u2014 beware the double meaning of the number &#8220;10&#8221;. The 10-2 grid tests a <strong>square area of 10\u00b0 \u00d7 10\u00b0<\/strong>: &#8220;10\u00b0&#8221; is the side of the square, i.e. a 5\u00b0 radius along each axis. The 10-2 is very useful for <em>characterising<\/em> the scotoma, but for the EyeMax decision you must measure the <strong>maximum<\/strong> scotoma extension from the grid centre, not the side of the test. In borderline cases (9\u00b0\u201312\u00b0) the calculator specifically recommends supplementing with 10-2 VF, MAIA or microperimetry.<\/p>\n<\/div>\n<\/details>\n<details class=\"emx-faq\">\n<summary>What is the most accurate method to measure the scotoma?<\/summary>\n<div class=\"a\">\n<p><strong>Microperimetry<\/strong> (Nidek MP-3, MAIA CenterVue, MP-1) is the gold standard: it measures retinal sensitivity point by point on a grid already expressed in degrees of visual angle, with eye tracking, and directly provides the scotoma radius with no conversions. The calculator is useful when starting from anatomical measurements (OCT, FAF, fundus photos) or for a quick first estimate.<\/p>\n<\/div>\n<\/details>\n<details class=\"emx-faq\">\n<summary>How does the millimetre-to-degree conversion work?<\/summary>\n<div class=\"a\">\n<p>At the foveal centre the classic rule applies: <strong>1\u00b0 \u2248 0.300 mm<\/strong> of retinal tissue (273 \u00b5m per Drasdo &amp; Fowler 2007, <em>Vision Research<\/em>), corrected for axial length: mm\/\u00b0 = 0.300 \u00d7 (AL \/ 24.46). In practice: in a <strong>myopic<\/strong> eye (AL 26 mm) one millimetre subtends <em>fewer<\/em> degrees; in a <strong>hyperopic<\/strong> eye (AL 22 mm) it subtends <em>more<\/em>. This is why entering the real AL \u2014 rather than the standard value \u2014 can change the outcome in cases near the cut-off.<\/p>\n<\/div>\n<\/details>\n<details class=\"emx-faq\">\n<summary>Can I use the optic disc as a reference if I don&#8217;t have an OCT caliper?<\/summary>\n<div class=\"a\">\n<p>Yes \u2014 it is the &#8220;bedside&#8221; method of mode 3: on a fundus photo or an en-face OCT containing both the lesion and the optic disc, measure both and use the proportion (1 disc \u2248 1.5 mm \u2248 5\u00b0 diameter). It is an estimation method: for cases near the cut-off, confirmation with calibrated OCT or microperimetry is still recommended.<\/p>\n<\/div>\n<\/details>\n<details class=\"emx-faq\">\n<summary>Does the calculator replace the EyeMax Mono Selector Tool?<\/summary>\n<div class=\"a\">\n<p>No. The official SharpView selector remains the final decision-making tool and requires professional registration. This calculator <strong>prepares the hardest value to obtain<\/strong> \u2014 the maculopathy extension in degrees of radius \u2014 to then enter into the selector.<\/p>\n<\/div>\n<\/details>\n<details class=\"emx-faq\">\n<summary>Is the patient data I enter saved or transmitted?<\/summary>\n<div class=\"a\">\n<p>No. The calculator runs entirely in the browser: no data leaves the computer, no cookies, no tracking. The patient fields are only used to compose the printable report.<\/p>\n<\/div>\n<\/details>\n<details class=\"emx-faq\">\n<summary>What are the scientific sources?<\/summary>\n<div class=\"a\">\n<p>SharpView Ophthalmology (<em>Patient Selection<\/em>); Robbie SJ et al., <em>J Refract Surg<\/em> 2018 (pilot study); Badal\u00e0 F et al., <em>OPTH<\/em> 2024; Hengerer FH et al., <em>BMC Ophthalmol<\/em> 2025 (European multicentre study, 196 eyes); Drasdo N &amp; Fowler CW, <em>Vision Research<\/em> 2007; the Bennett-Littmann formula for retinal magnification. The full list with links is in the calculator&#8217;s &#8220;Bibliographic sources&#8221; section.<\/p>\n<\/div>\n<\/details>\n<\/section>\n<p><!-- \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 BLOCK 4 \u00b7 SIGNATURE AND DISCLAIMER \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 --><\/p>\n<section class=\"emx-sign\"><strong>Dr. Alberto Bellone<\/strong> \u2014 Ophthalmologist and Eye Surgeon. Ocular microsurgery \u00b7 Premium refractive surgery \u00b7 ICL \u00b7 Keratoconus and cross-linking \u00b7 27G vitrectomy.<br \/>\nThis tool is for clinical-educational purposes and is intended for healthcare professionals.<br \/>\nIt supports data preparation for the EyeMax Mono Selector Tool and does not replace the surgeon&#8217;s clinical judgement for the individual case, nor the official SharpView Ophthalmology selector.<\/section>\n<\/div>\n<p><!-- \/eyemax-page --><\/p>\n<p><script>(function(){\"use strict\";function $(id){return document.getElementById(id)}var state={mode:1};var today=new Date();$(\"pData\").value=today.toISOString().slice(0,10);function parseNum(v){if(typeof v!==\"string\"){v=String(v==null?\"\":v)}v=v.trim().replace(\",\",\".\");if(v===\"\"){return null}var n=parseFloat(v);return isFinite(n)?n:null}function fmt(n,dec){if(n==null||!isFinite(n)){return \"\u2014\"}return n.toLocaleString(\"en-GB\",{minimumFractionDigits:dec,maximumFractionDigits:dec})}function ok(){for(var i=0;i<arguments.length;i++){if(!arguments[i]){return false}}return true}var modes=document.querySelectorAll(\"#eyemax-app .mode\");modes.forEach(function(btn){btn.addEventListener(\"click\",function(){modes.forEach(function(b){b.classList.remove(\"active\")});btn.classList.add(\"active\");state.mode=parseInt(btn.dataset.mode,10);[1,2,3].forEach(function(m){$(\"panel\"+m).classList.toggle(\"active\",m===state.mode)});compute()})});var vEl=$(\"verdict\");function setVerdict(cls,ico,title,sub){vEl.className=\"verdict \"+cls;while(vEl.firstChild){vEl.removeChild(vEl.firstChild)}var s=document.createElement(\"span\");s.className=\"ico\";s.textContent=ico;var d=document.createElement(\"div\");d.appendChild(document.createTextNode(title));if(sub){var sm=document.createElement(\"small\");sm.textContent=sub;d.appendChild(sm)}vEl.appendChild(s);vEl.appendChild(d)}function compute(){var AL=parseNum($(\"inAL\").value);var alNote=$(\"alNote\");var alValid=ok(AL!=null,AL>=18,AL<=34);if(ok(AL!=null,!alValid)){alNote.textContent=\"AL value outside the expected range (18-34 mm): please check.\";alNote.className=\"note err\"}else{alNote.textContent=\"Littmann standard: 24.46 mm. 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Please note: the 10\u00b0 quoted by the manufacturer and in the literature [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-22948","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/pages\/22948","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/comments?post=22948"}],"version-history":[{"count":5,"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/pages\/22948\/revisions"}],"predecessor-version":[{"id":22956,"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/pages\/22948\/revisions\/22956"}],"wp:attachment":[{"href":"https:\/\/albertobellone.it\/en\/wp-json\/wp\/v2\/media?parent=22948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}